C. Zufall, K. Wackerbauer, and C. Brandt, “The Influence of Hop Products on Beer Flavour Stability”, BrSc, vol. 61, no. 5/6, pp. 113–120, Jun. 2008, Accessed: Jun. 18, 2026. [Online]. Available: https://brewingscience.de/index.php/brewingscience/article/view/493